Megachile interrupta Say, 1824:351, ♂♀.Missouri. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643.:458 ( listed as synonym of Anthidium curvatum Smith, 1854); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1993 ( listed as synonym of Dianthidium curvatum sayi Cockerell, 1907). - As Anthidium interruptum: - Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution); Cockerell, 1897Cockerell, T.D.A. 1897. The New Mexico species of Anthidium. The Canadian Entomologist 29:220-223. (distribution).
Dianthidium Sayi Cockerell, 1907:136, no description.Trinidad, Colo., July 13, 1899 (leg. Titus); 1 ♀, 1 ♂, Boulder, Colo., Aug. 8, 1906 and Aug. 7, 1906 (leg. W.P. Cockerell). Replacement name for Megachile interrupta Say, 1824 by Cockerell, 1907Cockerell, T.D.A. 1907. New Anthidiinae bees from Colorado. The Canadian Entomologist 39:135-136.:136 (not Anthidium interruptum Fabricius). - Cockerell, 1907Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259. (distribution); Swenk, 1914Swenk, M.H. 1914. Studies of North American bees. II. Family Stelididae. University Studies of the University of Nebraska 14 (1):1-36.:27 ( listed as synonym of Megachile interrupta Say, 1824); Cockerell, 1925Cockerell, T.D.A. 1925. Anthidiinae bees in the collection of the California Academy of Sciences. Proceedings of the California Academy of Sciences ser. 4: v. 14 (15):345-367. (distribution); Schwarz, 1926Schwarz, H.F. 1926. North American Dianthidium, Anthidiellum, and Paranthidium. American Museum Novitates 226:1-25. (distribution); Schwarz, 1927Schwarz, H.F. 1927. Notes on some Anthidiine bees of Montana and California. American Museum Novitates 277:1-8. (distribution); Timberlake, 1943Timberlake, P.H. 1943. Racial differentiation in Nearctic species of Dianthidium (Hymenoptera, Apoidea). Journal of the New York Entomological Society 51 (2):71-109. (distribution). - As Dianthidium curvatum sayi: - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution).